Points of difference · The parity points · Element

The requirements

What the category expects as a minimum.

The part

What it is

Collected from what buyers check rather than from what the organisation considers important. Buyers eliminate before they compare.

The list rises over time as competitors add things, which means it needs revisiting rather than being set once.

The smallest level

The attributes it carries

Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.